CVE-2026-64146

Local denial of service via leaked metabufs

Published Jul 19, 2026 · Updated Jul 19, 2026

A resource leak in Linux Kernel 5.17 through 7.0.10 allows local users to exhaust memory by triggering EROFS xattr initialization errors. erofs_init_inode_xattrs() exits through out_unlock after erofs_read_metabuf() errors without calling erofs_put_metabuf(), retaining a folio reference. The issue requires local low-privileged access and EROFS xattr processing; repeated errors can exhaust kernel resources and interrupt service.

CVSS severity5.5
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A resource leak in Linux Kernel 5.17 through 7.0.10 allows local users to exhaust memory by triggering EROFS xattr initialization errors. erofs_init_inode_xattrs() exits through out_unlock after erofs_read_metabuf() errors without calling erofs_put_metabuf(), retaining a folio reference. The issue requires local low-privileged access and EROFS xattr processing; repeated errors can exhaust kernel resources and interrupt service.

The record

CVE
CVE-2026-64146
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-401, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.17
  2. Affected versionversion=bb88e8da00253bea0e7f0f4cdfd7910572d7799f <492c73b21fefa36f3869cb2b188ffb7fe37b3a9b
  3. Affected versionversion=bb88e8da00253bea0e7f0f4cdfd7910572d7799f <79b09c54c6563df9846ca3094bcfd72082c3e1d7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.17; version=bb88e8da00253bea0e7f0f4cdfd7910572d7799f <492c73b21fefa36f3869cb2b188ffb7fe37b3a9b; version=bb88e8da00253bea0e7f0f4cdfd7910572d7799f <79b09c54c6563df9846ca3094bcfd72082c3e1d7

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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